<!-- 定义模版对象 -->
<template>
    <div class="login_container">
      <div class="login_box">
        <div class="avatar_box">
          <img src="../assets/logo.png" alt="VUE图片" />
        </div>
        <!-- 登陆表单区域
              ref代表当前表单引用对象
             :model 是表格中封装的对象
        -->
        <el-form ref="loginFormRef" label-width="0" class="login_form" :model="loginForm" :rules="rules" >
          <el-form-item prop="username">
            <h3>用户名:</h3>
            <el-input  prefix-icon="iconfont iconuser" v-model="loginForm.username"></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <h3>密码:</h3>
            <el-input  prefix-icon="iconfont iconsuo" type="password" v-model="loginForm.password"></el-input>
          </el-form-item>
          <el-form-item class="btns">
             <el-button type="primary" @click="login">登录</el-button>
              <el-button type="info" @click="resetBtn">重置</el-button>
          </el-form-item>
        </el-form>
      </div>
    </div>
</template>
<script>
  export default{
    data() {
      return{
        loginForm:{
          username:'',
          Password:''
        },
        rules: {
           //定义校验用户名
           username: [
            { required: true, message: '请输入用户名', trigger: 'blur' },
            { min: 3, max:30, message: '长度在 3 到 30 个字符', trigger: 'blur' }
           ],
           //定义校验密码
           password: [
            { required: true, message: '请输入密码', trigger: 'blur' },
            { min: 3, max:30, message: '长度在 3 到 30 个字符', trigger: 'blur' }
           ]
        }
      }
    },
    methods:{
        resetBtn(){
              //this对象代表当前组件对象
              //console.log(this)
              //实现数据重置
              this.$refs.loginFormRef.resetFields()
            },
            login(){
              //获取表单对象之后进行数据校验
              //valid 表示校验的结果 true表示通过  false表示失败
              this.$refs.loginFormRef.validate(async valid => {
                 //如果没有完成校验则直接返回
                 if(!valid) return

                 //如果校验成功,则发起ajax请求
                const {data: result} = await this.$http.post('/admin/login',this.loginForm)
                if(result.status !== 200) return this.$message.error("用户登录失败")
                this.$message.success("用户登陆成功")

                //获取用户token信息
                let token = result.data
                window.sessionStorage.setItem("token",token)

                //用户登录成功之后,跳转到home页面
                this.$router.push("/main")
              })
            }
    }
  }
</script>
<style>
  .login_container{
    background-color: #00FFFF;
    height: 100%;
  }

  .login_box {
    width: 450px;
    height: 300px;
    background-color: #FFFFFF;
    /* 设定圆弧角*/
    border-radius: 10px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    .avatar_box {
      height: 130px;
      width: 130px;
      border: 1px solid #EEEEEE;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #DDDDDD; /* 添加阴影 */
      position: absolute;           /* 绝对定位 */
      left: 50%;                    /* 距离左侧50% */
      transform: translate(-50%,-50%);   /*回调50% */
     background-color: #FFFFFF;
      img {
        height: 100%;
        width: 100%;
        border-radius: 50%;
        background-color: #EEEEEE;
      }
    }

  .btns {
    display: flex;
    justify-content: flex-end;

  }

  .login_form {
    position: absolute;
    bottom: 5px;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }
}
</style>
